Variable-speed mechanism.



No. 848,768. PATENTED APR. 2, 1907.

V A. W. PUPKE.

VARIABLE SPEED MECHANISM. APPLICATION IILBD SEPT. 20, 1906.

2 MEETS-$112311.

'PATENTED APR. 2, 1907. A. W. PUPKE.

VARIABLE SPEED MECHANISM.

APPLICATION FILED SEPT. 20, 1906.

2 SHEETS-SHEET 2.

lvitmeaoe o UNITED STATES PATENT OFFICE.

VARIABLE-SPEED MECHANISM.

Specification of Letters Patent.

.Eatentea April 2, 1907.

Application filed septembe 20, 1906- Serial No. 335,345-

To (ZZZ whom it "may concern: a

; Be it known that I, ARNOLD W. PUPKE, a. citizen of the United States, and a resident in. the borou h of Manhattan, city county, and State of New York, have invented certain new and useful Improvements in Variable- Speed Mechanism, well adapted for general use, but especially intended for automobiles, autoboats, and the like, of which the follow-, ing is a specification, reference bein had to the accompanying drawings, in whic Figure 1 illustrates an end elevation of the machine, some of the arts being shown partly in perspective. ig. 2 illustrates a vertical longitudinal section, the shafting being shown in elevation, taken on the medial line of the shafting. Fig. 3 illustrates a dated July 31, 1906, relates to mechanical,

transverse sectional view taken on the line 2 2 of Fig.8. .Fig. 4 illustrates a perspective view of the shafts for the speed-varying gears, showing alsoassociated parts This invention, while enerically kindred to those for which I'have eretofore obtained Letters Patent of the United States, No. 823,970, datedJune 19, 1906, and No, 827,119,

constructions and methods of operation which differ materially from said other inventions and which' under certain circumstances and for certain uses maybe preferred to them.

The characteristifie features'of this present invention are the simplicity and mechanical effectiveness of the parts, thesmoothness with which transition from high to low or any intermediate speed may be effected, and that the mechanism is relieved of excessive strains during the transition; that the machine may be operated with direct connection from the motor-shaft to the propellingshaft without transmission through the parts which effect the speed variations; the compactness of the mechanism, whereby it may all with peculiar ease and efficiency be inclosed. withina dust-proof case, and the certainty and positiveness with which the relations between v the several parts may be cha gecl as required by the desired speed variations. Referring to the drawings, A is the motorshaft. Bis a gear keyed to the motor-shaft, which meshes into a gear C, which may be of the same or different diameter as the gear B.

Itiis keyed upon a counter-shaft l), which may be 'journaled in any suitable bearings-- as, for example, upon appropriate rigid parts of the frame of the machine, as illustrated at and F.

G is a circular plate keyed upon the end of the shaft 1) and provided with three laterallyprojecting bosses H. (See Figf 3.) These bosses support a flat ring I, which is held to them by screws J. Intermediate the bosses H hub-like parts K are formed upon the circular plate G, through which pass shafts L, the outer ends of which are journaled in, and consequently supported by, the flat ring I.

M M M are gears mounted upon the shafts L. They have recesses N formed in them, each of which contains a coiled spring O, fast,at ore end to the hub of the gear, as at P, (see Fig. 3,) and at the other end to a plate Q by pin R. (See Fig. 3.) ()ne of these plates is rigidly connected to each of the shafts L, as shown in Fig. 2.

The shafts L are not truly cylindrical throughout; on the contrary are constructed as illustrated in Fig. 4-that is to say, each shaft is provided with two feathers S S on opposite sides of the shaft, which enter stud play in recesses T '1, made in the hubs of the gears M M M? ,respcctivcl y. These recesses are larger circumfcrlmtially of the shaft IA than the feathers referred to are, so that the latter have rotary play therein. The purpose of this construction and that of the springs which coact therewith will be exp ained below.

U U U are cranks fast on the ends of the several shafts L, witbwvhich are pivotally connected l nks or radius-bars V V V by means of hubs W W W, winch have considerable length, as shown, so as to securely support the wrist-pins Y Y Y. The links or radius-bars are all pivoted upon a stud (1., which is supported in the center of a substantial hub b, located in the center of a sliding 'cross-head a, supported in suitable slideways in appro n'iato rigid parts of the frame (6 d.

6 (see big. 3) is a small gear made integral with another larger gear 1 -tha, -is to say, "they are both preferably cut from the same piece of metal, which isjournaled upon a suitable rigid part. g of the frame made ecrentric to the axis of the cmmter-shaft l). The gear fmeshes into a larger gear 11., which is keyed upon the driving-shaf t i. The shaft i is coaxial with the motor-sbaft A,and both of these shafts are/provided at their adjoining ends with feathers'j and la Zc, respectively.

Z is a gear slidably mounted upon the drivingshal't 'i, the hub of which-is provided with feather-ways to coincide with the feathers Ir l. of the drivingshal't and j of the motorshal't, so that when the gear I is moved into proper position spanning the joint between the ends of these two shafts they will be locked together by reason of the engagement i between the. feathers j j and lit 1.? and the hub l of the gear. 'lhis gear I is likewise provided with a groove m, made in its hub, in which works a spanner 71, which connects with a gear-shifting rod 0, suitably supported upon rigid parts of the frame p. 1 is another gear rigidly keyed upon the counter-shaft l), with which the gear may engage when dc sired. The construction, however, is such that the gear [may be moved to the left out of engagement with the gear and so as to lock the motorshaft A andthe driving-shaft 'i together, or it may be moved somewhat to the right, yet not so far as to engage the gear (1, but so as to be beyond the joint between the motor-shaft A and the driving-shaft i. This is its position in Fig. 2. it may also be moved still further to the right into engagement with the gear q and likewise yet farther to the right, so as to be out of engagement with the gear (1, and carried idly by the driving-shaft i by means of the feathers /r Itongaging in its hub.

As stated above, the axis of the gear 0 is eccentric to the axis of the counter'shaft .l) in other words, to the axis ofthe plate G, which carries the gears M M l\l.-andthe size relation bot-ween the gear :2 and these gears M M M is such that they are in full mesh. only as they pass over the upper are of the. gear e and that they come into contact and begin to come into mesh and likewise recede from each other, passing out of mesh at about a horizontal line through the gear c, and in order that there maybe no jamming of the gear-teeth or undue stress while not in full mesh l have provided the feathers s upon the shafts L and the enlarged recesses 'l in the hubs of thcgears M M. M and the coilsprings O.

The operation of these parts is as follows: If it should happen that any of the teeth of these several gears should make contact end to end, so that there would be possibility of jamming, then the pressure thus exerted would at once cause the gear M or M or M to move. slightly upon its axis, overcoming the tension of the spring 0, during which operation the feathers S would. move to a greater or less extent, as might be nccessr through the enlarged recesses T they work, thus gear to adjust itse f in such manner that the opposed teeth of the interfering gears would tuatmg s php on one another and properly enter the open spaces between the teeth, thus relieving the apparatus of all strain and jamming. The i Y with the gear 1% until the next succeed. 1g one has made cmmection therewith. Another function which the springs perform is that while the speed-varying mechanism is running idly, the ell'ective power being transmitted either directly through the motorshaft and driving-shaft or through the motorshaft and gears B, C, (1, and l and coun tershaft D, then these springs maintain smooth, noiseless, and, so to speak, elastic movement of the speed-varying parts, which are then, as stated, running idly. i

The appliances whereby the spanner '12, which aetuates the gear l last above considered, and likewise those which actuate the sliding cross-head c, areillustrated in 1. Before describing the parts, however, it will state generally the operation of this part of the mechanism in order that the description may be. more easily understood. There is a single lever which projects upwardlyintp a position accessible to the operator,

lever is pivoted and has a disk-like pap centric with-its pivot, upon the. peri'ph which are intermitted co s or gear-te tween which are surfaces concentric u pivot, and adjacent the etc are r pivoted dislelilre devices which likewise l. upon their peripheries intermitted gear-tee [h adapted to mesh with those upon the d of the lover above described, and between s it intermitted gear-- teeth 11303 the lastnanied parts there are surfaces tL(l.""Ll to engage w th the surfaces upon the, t

act as locks thereof, one of these las pivoted devices actuating the slidir head c above described and the oil ing with. the bar 0, to which ti. connected, which actuates the ing along the driving-shaft i, scribed.

in the drawings hereof, and f Fig. l, I show an arrangemen; which is not intended to he t'l i'iecessarily beemployed in the n con struction, but more in t e nature of (I grammatical illustration ti tb 'i the movement about to he dcsc.-' appreciated. In practically e, the special construction oi the devices will vary.

The descrintioi ism shown iri i it ,1, place accessible to the op rater. r beneficially be provided with a suite 1 with confining-dog, indicator, 10., usual such n'iechanism.

call

' .or journaled at 9 and 10.

and 6 are the intermitted gear-teeth referred to. 7 and 8 are the disk-like parts adjacent to the part 2, which are respectively pivoted They are provided with intermitted gear-teeth 11 and 12, 3 and 14-. A connecting-rod 15 is pivoted at 16 t0 the disk 7 and at its opposite end is pivoted,

as at 17, to the sliding cross-head c, as shown. The bar 0 (see Fig. 2) is pivoted to a bellcrank lever 19, which through a series of pivoted levers and connecting-bars (which appear on Fig. -1 and are arbitrarily illustrated merely to show that any preferred method of connecting tliebar 0 to the disk 8 may be employed) is connected with the disk 8 atthe arbitrarily-indicated point 20.

The operation of the-apparatus as a whole as constructed in the example illustrated is as follows: The motor-shaft A is driven by the motor in the usual manner. Its rotation drives the gears B and C and counter-shaf t D all at equal speeds. D in its rotation carries about with it the plate G and the series of gears M M Mt, and in their rotation these last-named gears intermittently pass into and out of enga ement with the gear (2 some what after the fashion of theprdinary wellknown planetary gearing, one of these gears taking hold before the other lets 0. At this point takes place a fundamenta difference of operation from anything heretofore known, as I believe, except as somewhat similar operations are set forth in my aboverecited Letters Patent--that is to say, the gears M M M not only have the rotary motion due to the rotation of the plate G, by which they are carried, but likewise since they are inde endently mounted upon their individual siafts L, provided with cranks and connecting-rods or radius bars U and V, which are connected with the sliding cross-l'lead (1, they may be given an oscillating movement upon their individual shafts, and there will be one complete oscillation of each of these gears in each completerevolution of the plate G, and, further,

as illustrated in the drawings hereof, the

forward oscillation will take place during the times that they are respectively in mesh with the little gear e, the return orbackward half of the oscillation taking place when they are out of gear therewith andlthat this result ,is effected because the axial center of the cross-head is, as shown in Fig. l, at the right of the axial center of the counter-shaft D, and obviously the stated movements ofthe parts will be reversed if the position of the cross-head were such that its axial center would be at the left of the axial center of the counter-shaft D, and if these two centers were coincident or concentric then there would be no oscillatory movement whatever of the gears M M. M,

From the foregoing description it will be obvious to those who are familiar with such matters-that the rotary movement of the gear 0, and consequently of the gearf, may be differentiated from that of the countershaft D, either accelerated above or retarded below that speed, and therefore that inasmuch as the gearf meshes into the gear 72., which is keyed upon the driving-shaft i,- the speed of the last-named shaft may be differentiated from the s eed of the motor-shaft A and also that, if desired, the cross-head being moved so that'its axial center is coincident with the axial center of the shaft. D the speed of that shaft and that of theigear f will be equal, and consequently the rotationof the driving-sl'iaft 'i will depend upon the re lation which exists between the gears f and 71. Thus we see that the position of the sliding crossdlead 0 determines the increase or decrease of the speed of the driving-shaft i. and its position is adjusted and controlled through the devices shown in Fig. 1, as above stated, the operation of which, briefly described; is as follows; Before describing the mechanism, however, it should be stated that the specific arrangement of the parts illustrated in the drawings is such that the maximum speed will be the speed of the motor-shaft A, and all deviations therefrom will be reductions in speed, and it is one of the especial advantageous features of my invention that when running at maximum speed. the driving-shaft and the motor-shaft are locked together, thus relieving all of the other mechanical arts of strain and wear, because although they run. they are not transmitting power, the power being transmitted direct from the motor-shaft to the drivingshaft, yet when itis desired to differentiate the speed t se two shafts may beuntocked from each other, thus permitting independent revolution and then and not. until then' is the speed-varying mechanism thrown into action.-

Another important feature of my inven tio'n is that it freryuently happens, particu-.

diate gears, thus although at such time the speed varyin'g mechansm runs itis not doing work. 1

A further important feature of my invention is that when desired the speed-varying mechanisn'l may be thrown into operation to the exclusion of the two systems of power transmission above referred to, in which event the machine will be under immediate and instant control for practically all speed variations, which are effected in a smooth shoekless manner. i

Referring now to the drawings, Fig. l illustrates the parts in the position which they occupy when the machine is running at nearly but not quite its maximum speed. In it the disk N. which, as stated, controls the position ol' the sliding gear I, is locked by engagement of its surl'aee 5t gainst. the surface 51 of the disk 2, and disk 7 is in mesh with disk 2 because of the engagement of their respective gear-teeth it and 4-. Now, therefore, in order to slide the cross-head c to the right in other words, into full-speed position*the lever 1 is moved in the direction of the arrowa", the ell'ect ol' which through the engaging teeth I] and 4 is to rock the disk 7 upon its axis 9 until the locking-surface 52 of the disk 7 comes into cont act with the enacting sur' face 5] ol' the disk 2. In this positionthe speed of the driving-shaft i will be Full speed, the transmission of power being as follows: from the motor-shaft A through gears B and to counter-shaft l), through that shaft to the )late (l, through itto the gears M M M as they successively engage with the little gear e, through that gear and the gear f, which rotates with the gear to the gear ll, which is keyed upon the driving-shalt i, and the arrangement is such that when the parts are constriu-ted and arrahged as shown in this special instance the speed ol the drivingshaft will then be the same as that of the m tor-shaft A, and when in this position, upon continuing the movementof the lever l in the direction ol' the arrow (1 the gear-teeth 5 of the disk 2 will engage with the teeth 13 ot' the disk 8, rotating that disk upon its axis 10, whereupon through the inst rumentalit v of the bell-cranks shown the spanner-rod 0 will be moved in such direction as to'slide the gear I to the left upon the driving-shaft i until it looks with the 'leathers upon the motorshal't A, and thus that shalt and the drivingshalt i will be locked together and the power will then be transmitted through these two shal'ts, relieving the speed dill'erentiating mechanism and the count (r-shaft, upon which they are in part mounted, of strains and wear, although they will all continue rotating. \Vhen the parts are thus locked together, it will he noted that the locking-surface 52 of the disk 7 maintains the cross-head and all its coacting parts in their th'en position, because of its locking contact against the surface 51 ot' the disk), and the disk 8 will likewise be held in its "then position because of the engagement of its gear-teeth 13 with the teeth 5 ol' the disk 2. It now it is desired to differ entiate the speed, the lever is swung from its then position in the opposite direction-that is to say, in the direction of the arrow (1.

The first effect of this movement is to return the disk 8 to the position shown in Fig. 1,

withdrawing the gear Ztrorn its locking position andbreaking the connection between the motorshaft and the driving-' shaft i and bringing the lockingsurface of the disk 8 and 51 of the disk 2 into contact, and at substantially the same time bringing into engagement the gear-teeth 11 of disk 7 and 4 of disk 2, and upon further movement of the lever 1 in the direction of the arrow 0/ these gear-teeth rotate the disk 7, pressing the cross-head c to the'left, thus causing its axial center to approach the axialcenter of the counter-shaft D, and as thesctwo centers approach each other the oscillating movement ollthe gears M M M, heretofore described, becomes less and less until they coincide,

when there is no, oscillation whatever'and no dillerentiation of the speed thereby. At about this point, depending upon the exact size relation of the gears to each other, which is a matter of detail of construction, (I ordinarily prefer to have the gear}- one half that of the gear h and the gear g onehalf that of the gear 6,) the teeth 14 of the disk 8 engage the teeth 4 of the disk 2, whereby the disk 8 is rotated, and consequently the gear Z is moved to the right along the driving-shaft 'i and caused to intermesh with the gear g on the counter-shaft,- and at this same time the locking-surtaee 53 of the disk 7 makes contact with the corresponding sur face 541 of the disk 2, so that'the sliding crosshead and all its associated parts are thereby locked in theirthen position. The engagement of the gear l with the gear (1 is effected smoothly and easily, because they are then both running at the same peripheral speed. In this way, the parts being locked in their then position by reason of the engagement of the surfaces 53 and 54 and of the gear teeth 14 and 4, respectively, the driving-shaft runs at half speed, the transmission being from the motor-shaft through gears B and C to counter-shaft D and from it back again below half speed, then the lever-l is moved still farther in the direction of the arrow (2 until the following engagements take place simultaneousl that is to'sav, the teeth 12 of disk 7 and t e teeth 6 of disk 2 engage with each other and the locking-surface. 55 ot disk 8 engages with the surface 54 of disk 2, the effect of these movements being to slide the gear Zstill farther to the rightalong the shaft. 1' until it is disengaged from the gear (1, and it remains locked in that; position. Thercupon by still farther movement of the lever 1 in the direction of the arrow a the engagement of the gear-teeth 12 and 6 upon the disks 7 and 2, respectively, results in the rotation of the i (a) The operator of the.

' shalt instead ol below it, as in the instance pairs of as I am 'aware,are not realized in any similar disk 7 and the movement of the cross-head 0' to the left so that its-axial center lies to the left of the axial center ol the counter-shaft D to such extent as desired in other words, to effect the required reduction in speed-be cause, as is obvious, the movement of the axial center of the cross-head efl'ects an oscillation of the gears M M M, so as to cause the oscillations to take place in diametrically the reverse manner to that which resulted when the axial center of the cross-head was at the right of the axial center of the countershal't l). I As heretofore stated, the construction illustrated in thedrawings hereof is one form only in which my invention may be embodied, and in that form the maximum speed 1 is the speed of the motor-shaft; but it will be i clear to those who are familiar with such l matters that by appropriate mmlilication of i the parts and their relation to each other the resu ts may be widely varied to meet varied requirements--that is to say, the speed variations may be above that of the motorillustrated, or above and below; also, thatI have omitted many parts which in an actual mechanism would be prescn-tsuch, for example, as journal-boxes, oil-cups, keys, & c.] In short, 1 have not attempted to make the drawings herein working drawings. All these matters will be readily appreciated and properly worked out by the constructor.

It wi 1 also be obvious that the underlying principles of my invention may be employed in mechanism adapted to a greaterscope of speed differentiation than is possible in the particular construction illustrated in the drawingsas, for instance, by the addition at appropriate places of additional gearing. For example, I have illustrated a single sliding gear Z, which likewise acts as the clutch to connect the motor-shaft and the drivingshaft together. Obviously there may be a i series of these of different diameters coacting with a series of gear-Wheels q ofdiil'erent diameters on the counter-shaft, 'so spaced that the intermeshing between thc'diilerent l gears shall take place sm cessively. All this matter is within the intelligence of 1 those Who are skilled in this art, and therefore need not be illustrated or described.

It will be noted, as heretofore stated in this specification, that under my invention I secure the following advantages, which, so far mechanism heretofore knownthat 18 to say, mechanism by the simple act of moving a single lever can connect the motor-shaft with the driving-shaft, and thus effect the transmission of the power direct from the engine to the load, all other parts of the mechanism being relieved of the power is then transmitted being through a counter-shaft and four comstrain and wear. (b) By another movement of this same lever the: speed of the driving speed, and 'from the enshaft is gradually reduced to half gine to the load at half rable, and efleetive' means, the transmission mon spur-gears only, the other parts of the speed by simple, du-' mechanism running idly, relieved of strainand wear.. (0) By another movement of this same lever the speed can be reduced to an absolute standstill. results are secured ina smooth, noiseless, strainless manner and b the employment of mechanical devices freed iom intricate or delicate parts-thus durable and not liable to fracture. (e) While the several positions they are a solutely locked in position, so that there is no possibility of disarrangement which might result in fracture of parts or accident, and the control in tl-igmatter rests in ferred to.

In addition to the foregoing-there are the advantages pertaining to thedetail of construction heretofore noted.

1. In mechanism of the class stated, the combination of a motor-shaft, a drivingshafii and a counter-shaft, gears connectin the motor-shaft with the counter-shaft, variable:

speed devices carried by the counter-shaft 9 adapted to drive the driving-shaft at all de- (d) All these desirable ap aratus is in its the single lever above regrees of speed between the maximum and y i shaft, other gears connecting the counter- 1 shaft with the driving-shaft and means to lock the motor-shaft and the driving-shaft together.

2. In mechanism of the class stated, the

combination of a motor-shaft,' a driving-shaft I05 and a counter-shaft, gears connectin the motor-shat t with the counter-shaft, variablespeed device's carried by the counter-shaft adapted to drive the driving-shaft at all doand a counter-shaft, gears connecting the mo motor-shaft with the counter-shaft, variablespeed devices carried by the counter-shaft adapted to drive the drivingshaft at alldegrees of speed between the maximum and minimum speeds of the mechanism, means to 1 25 adjust the variable-speed devices and gears connecting said deylces with the drivingshaft.

4. In mechanism of the class stated, the" grees of speed between the maximum and no combination of a motor-shaft, a driving-shaft 0 and a counter-shaft, gears connecting the j inotorshait with the counter-sh:ilt, variablcspeed devices carried by the counter-shalt adapted to drive the driving-shall at all degrees of speed between the maximum and minimum speeds ol the mechanism, means to lock the motor-shalt and the driving-shalti together and means to adjust the rnriablcspeed devices which liucwis'e actuate the said locking devices.

5. ln mechanism of the class stated, the combim-ition ol a moronshafi, a driving-shallv and a countcr-soal't, gears connecting the motor-shalt and counter-shalt, a sliding gear upon the driving-shalt, means upon the drivlug-shalt and toe motor-shalt coacting with the hub of the sliding gear whereby it is adapted to longitudinal movement over them, but not rotary movement on them, a fixed gear upon the counter-shalt with which. the sliding gear meshes, and means to mono the sliding gear longitudinally of the drivingsha'lit and motor-shaft.

6. In mechanism. of the class combination of a motor-shaft, a drivingshal't, counter-shaft, gearing connecting the inoto'rshaft to the counter-shaft, trans mitting gearing connecting the countershaft to the driving-shaft, means to lock and unlock the motor-shaft and the drivingshaft, speed-varying devices geared to the driving-shaft, a single lever and mechanism coacting therewith, whereby the transn'iitting-gearing is connected and disconnected and the locking and unlocking devices are brought into action when the coacting parts are made to move synchronously .by the speed-varying devices.

7. in mechanism of the class stated, the combination of a counter-shaft and driving means therefor, a plate on the counter-shaft, a plurality of independently-oscillating gears supported by said plate, adjustable devices whereby the last-named gears are caused to oscillateduring their rotary movement about the axis of the counter-shaft, and a powertransmitting gear; the axis of which eccentric to the axis of the countenshal't and with which the oscillating gears intermittently engage. l

8, ln mechanism of the class stdted, the combination of a counter-shaft and driving means therefor, a plate on the counter-shaft, plurality of independently-oscillating gears supported by said plate, devices connected with said oscillating gears whereby they are caused to oscillate during their rotary movement aboutthe axis of the counter-shaft and the time and extent of their oscillation determined and a power-transmitting gear, the axis of which is eccentric to the axis of the counter shaft with which the oscillating gears engage.

9. in mechanism of the class stated, the combination of a counter-shaft and driving stated, the

means therelor, a plate on the counter-shaft, a plurality ol indcpendently-oscillating gears supported by said plate, shnl't-s for the sup- 3 port ol the oscillating gears, cranks 0n the slml'l's, radius-bars pivoted at one end to the l cranks and at their other ends to a pin common to them all, a'support for the pin and means to move the support so that its center shall be concentric with or eccentric to the center ol' the counter-shalt and a power-transmitting gear with which the oscillating gears intermittently engage.

ll). [n mechanism ol the class stated, speed-varying devices comprising a plurality of oscillating gears, a shalt about which said oscillating gears revolve, a powcrtransmitting gear the axis ol which is eccentric to that of the first-named shaft and means wl'ieroby the oscillating gears are caused to oscillate to and tro once during each coinplete revolution.

ll. in mechanism of the class stated, speed-varying devices comprising a plurality ol oscillating gears, a shalt about which the {mediating gears revolve, a powcr-trnnsmitting gear the axis of which is eccentric to that ol" the first-named shaft, means whereby the oscillating gears are caused to oscillate to and fro once during cacli complcte revolution and other means to determine the extent of such oscillation.

12. in mechanism of the class stated, a motor-shalt, a driving-shalt, a counter-shaft, speed-varying devices adapted to drive the driving-shaft at all degrees of speed between the maximum and minimum speeds of the mechanism, means whereby the motor-shalt and the dri ving-shalt may be locked together lor directdrive, transmittirig-gears which may connect all three of said shafts and thus the power from the motor-shaft be transmitted to the driving-shalt through the counter-shaft at a predetermined speed, other gears whereby the power may be transmitted to the driving-shaft through said spcedwarying devices at variable speeds, and

means to throw one of said sets of devices out of action to allow the speed to be varied by the other set.

13. in imichanism of the classstated, the combination of a countenshaft, a plurality of oscillating gears carried by the counter-shaft about its axis, a gear the axis of which is cccentric to the oi the counter-shaft with which said oscillating gears intermittently engage, means whereby said oscillating gears are caused to oscillate to and fro once in each complete revolution, means on the shafts of the oscillating gears whereby they are allowed limited rotary movement thereon and springs connecting the oscillating gears with their shafts whereby the gears are elastically held relative to their shafts.

14.. In mechanism of the class stated, a n'iotor-shalt, a counter-shaft and a drivingseems and gearingconnecting them with the drivingshaft, and a lever coacting with the speeth varying devices and the sliding gear upon the driving-shaft, whereby the follmvlng power transmissions may be secured, first, from the motor-shaft direct to the driving-shaft at the speed of the motor-shaft; second, from the motor-shaft to the counter-shalt and thence to the driving-shaft at a speed diilerent from that of the niotorshait, and third, from the motor-shaft'to the counter-shaft, thence to the speed-varying devices and from them to the drivingshaft at varying speeds.

15. iii mechanism of the class stated, a motor-shalt, a counter-shatt and a drivingshaft, gearing coiniecting the motor shaft and the counter-shaft, earing connecting the counter-shaft and the driving-shaft adapted to diilerentiatc the speed of the driving-shaf t relative to that of the motor-shaft, the gear upon the driving-shaft being ltmgitudinally shdable and adapted to lock the driving shalt to the motor-shaft, speed-varying devices and gearing connecting thenhwith the driving-shaft, and a lever ccaeting with the speed-\ 'arying devices and the sliding g 11" upon the driving-shaft, whereby the following power transmissions may be secured, first, from the motor-shaft direct to the driving-shai't at the speed of the motor-shaftf second, from the motor-shaft to the countershei't end thence to the driving-shalt at a speed different from that of the motor-shaft, and third, from the motor-sh aft to the counter-shai't, thence to the speed-varying devices and from them to the driving-shaft at varyingspeeds, and means to positively hold the mechanism in the positions they occupy during eachof said arrangements.

16. In mechanism of the class stated, speed-varying devices and devices 'for eil'ect ing direct and indirecttransmission of the )ower, in combination with a lever, a series of rolten gears and suitable connecting devices between the broken gears and the speed-varying and the direct and indirect transmission devices, whereby, depending on the po- L sition of the lever, the power may l36-t18J13- mitted direct and at constant full motor speed, or indirect at a different but constant speed, or at gradually-variable speeds.

17. in mechanism of the class stated, the combination of a IllOlLOIrSllfll-i), a countershaft, and a driving-shat t, gearing connecting the motor-shaft and the counter-shaft, traiisiiiittiiw-geariiig connecting the motor shaft and die driving-shaft, means to lock the motor-shaft and the driving-shaft together and to unlock the same, devices geared to the driving-shaft adapted to drive it at all degrees of speed between the maximum and minimum speeds of the mechanism, a single lever connected with said last-named devices and with the means for locking and unlocking the motor-shaft and the drivin eshaft and means to positively and safely hold the arts in such ositions as they may be 1I1OV8( into by said lever.

in testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARNoLi) W. PUPKE.

-Witnesses J. H. VVHIPPLE,

W. H. ROBERTS. 

